We never leave her unless we're on full hookups and can leave the AC / Heat Pump on. No different than when we lived in a house. However, RV park power being what it is (sometimes unreliable), we use MarCELL to keep an eye on Daisy's environment when we're not home.
It monitors power, temperature, and humidity. It does require service, which is $99/yr. You set thresholds (high and low) online for both temperature and humidity and define notification methods (text / email) all online. Then, when anything is amiss with anything, both Tara and I get emailed and texted immediately. You can also check the temp and humidity online.
However, we're hopeful that Ring or someone will come out with a device that integrates with our Ring security system. When that happens, we can get rid of the MarCELL and it's separate fees.